Spark-arrester.



No. 686,404. Patented Npv. I2, |90l.

A. E. HESS.

SPARK ARRESTER.

(Application filed June 11, 1901.)

(No Model.)

] vanto/s UNrTEn ASTATES PATENT OFFCE.

ALVIN E. HESS, OF CONYNGHAM, PENNSYLVANIA.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent N o. 686,404, dated November 12, 190,1. Application filed June l1. 1901. Serial No. 64,129. (No model.)

To cir/ZZ whom, t myconcernf Beit known that I, ALVIN E. HESS, a citizen of the United States, residing at Conyngham, in the county of Luzerne and State of Penn- Sylvania, have invented certain new and useful Improvements'in Spark-Arresters; and I do hereby declare the following to be a full, clear, and exact description' of vthe invention, such as will enable others skilled in the art to which it appertains to make and use lthe same.

M yinvention relates to spark-arresters and smoke-consumers; and it consists of certain novel features of combination and construction of parts, the preferred physical embodiment whereof will be set forth in the following specification and illustrated in the accompanying drawings, made a part hereof.

The prime object of my invention is to provide means located in the smoke-stack or chimney of an engine or furnace which will insure that sparks and other similar products of a furnace will be checked or arrested before they shall have passed out of the stack.

Other objects and advantages will be hereinafter made fully apparent.

In the accompanying drawings, Figure 1 is a vertical central section of an ordinary smokestack,showing myinvention as applied to use in the upper portion thereof. Fig. 2 is a perspective detail view of the damper or valve employed by me to control the direction or line of draft.

In referring to the numbers on the drawings, 1 indicates a smoke-stack of the usual or any preferred construction, 2 showing a common form of terminal or head therefor, the upper portion of the head being restricted, as is common, as indicated by the numeral 3. Mounted within the enlarged portion of the stack thus or otherwise provided I dispose the smoke-defiecting member 4, which is substantially conical in general outline, the position of the cone being invertedV while the upper and lowerends thereof are left entirely open, the lower opening 5 being substantially of the same diameter as the stack proper, 1, while the upper end is .of much greater diam# eter. The member 4 is sustained in its operative position within the head 2 in any preferred or suitable manner, as by a series of brackets 6, radially secured at proper intervals to the outer surface of the member 4 and extending into engagement with a contiguous part ofthe inner surface of the head 2, suitable rivets being employed to retain said brackets in an anchored position.

A The restricted portion of the head 3 is provided with a -flange 7, to which I attach, as by a series of rivetsS, the inwardly-directed or downwardly-depending collar 9, the downward reach of said collar being sufficient to extend within the chamber formed by the member 4, so that the lower edge of the collar will be left wholly out of contact or engagement with said member. The collar 9 is provided with one or more radial flanges 10, which extend entirely around the collar at proper intervals and are designed to subserve a purpose hereinafter more fully set forth. If desired, the ,lower end of the collar 9 may also be directed outward, thereby providing a flange 11, corresponding in function with the 'anges 10. The outer surface of the member 4 is also provided with downwardlydirected radial Aflanges 12, which reach into the annular chamber 13, located between the inner surface of the head 2 andthe outer surface of the member 4.

In order' to enable the operator to open and close the opening 5 inthe lower end of the member v4, I provide the valve or damper 14, which is preferably conical upon its upper and lower surfaces and is provided with a suitable ear or eyebolt 15 and with the hinged section 16, whereby it may be pivotally secured to a contiguous part of the lower edge of the member 4, it being so hinged or connected to said member that it may be freely dropped downward or disposedin an open position, as indicated by the dotted lines in Fig. l. In order that the Valve or damper 14 may be placed fully within the control of the operator, I provide the ear or bracket 17, to which I'pivot-ally secure the controlling-lever 18,.the inner end of which is connected by means of the link-section 19 with the earl, while the outer endl of said lever is attached to a controlling-rod 20, extending downward to a convenient point. In Fig. 1 I have also shown the usual formof exhaust-pipe, said pipe being indicated by the numeral 21, and it is obvious when the damper 14 is disposed in a horizontal or closed position or in the position -indicated in Fig. 1 that the line of draft will be upward through the annular chamber 13 and thence between the upper edge of the member 4 and the collar 9, said line of draft extending under the edge of said collar and thence upward into the open air. The lower edge of the damper 14 being conical, as indicated in Fig. 1, will facilitate the spread of the smoke and sparks carried thereby, so that the same will be directed laterally and thence upward through the annular chamber 13 and thence outward through the collar 9. The radial iianges 10 and 12 will engage unto themselves or arrest large quantities of the sparks,which, beingthus checked, will fall downward into the cinder-receptacle of the engine, while those sparks and cind'ers which should escape the flanges 12 and pass upward through the annular chamber 13 and over the flange 22 on the upper edge of the member 4 will then be directed downward in order to pass the lower edge of the collar 9, and inasmuch as their line of travel is downward their own momentum willcarry them to a point entirely ont of the line of draft, when they will settle or rest upon the damper 14.

I desire to 'call special attention to a very important provision which I have made to insure that any sparks or cinders passing the upper edge of the member 4 will not be carried upward through the collar 9, said provision being that I have restricted or narrowed the pathway of the line of draft by disposing the flange 11 quite near the inner surface of the member 4, and it is therefore clear that since the chamber formed by the collar 9 is of much larger size than the passage-way left between the flange 11 and the member 4 lthe enlarged chamber comprised by the collar 9 will reduce the speed of travel of the smoke, and thereby insure that the sparks which may have passed under the edge ofthe collar 9 will be left free to fall downward upon the damper 14. In other words, I have at a certain point greatly restricted the pathway of the smoke, cinders, and other products of combustion and have abruptly widened said pathway, all of which is done before the smoke leaves the stack, and since the eX- haust-steam will force the smoke, dro., very rapidly past the lower edge of the collar 9 the greatly-enlarged exit-orifice provided for the smoke by moans of the collar 9 will instantly reduce the speed or movement of the smoke, as above set forth, thereby not only utilizing the momentary pause within the collar 9 to enable the sparks to move downward, but I also utilize the momentum of the downward movement of the sparks as they pass under the ange 11, carried by said collar.

Actual practice has demonstrated that my spark-arrester will actually perform the office to which it is assigned, to wit: It will arrest the sparks before they have passed out of the stack and will either check them before they have reached the upper edge of the member 4 or will deliver them upon the upper surface of the damper 14, which latter may be freed of its load from time to time by dropping the same downward, as indicated by dotted lines in Fig. l.

Having thus described the construction and operation of my improved spark-arrester,fur ther reference to the details thereof is deemed unnecessary, and while I have described the preferred construction and combination of part-s it will be understood that I desire to comprehend all substantial equivalents and substitutes that may be considered to fairly fall within the scope of my invention.

What I claim as new, and desire to secure by Letters Patent, is-

1. In aspark-arrester,the combination with a stack or chimney, of an inverted coneshaped member 4; a damper provided for the lower end of said cone; means to suspend said member within 'the stack or chimney; a plurality of radial flanges 12 carried by said member, and a collar 9 secured to the stack and depending downward into the chamber formed by the member 4, said collar being provided with a plurality of radial flanges 10 and l1, the lower edge of thc collar being disposed near the member 4, whereby the path of the smoke, &c.,will at this point be abruptly restricted land. means to close and open the lower end of said member at will, all substantially as specified and for the purpose set forth.

2. In a spark-arrester,the combination with the stack of two coperating chambers formed by the members 4 and 9; suitable means to suspend said chambers in their operative positions, radial fianges 10 and 12 carried respectively by said chambers and a damper carried by the lower end of said member whereby the line of draft may be directly upward through said chambers or indirectly around the member 4 and thence downward under the lower edge of the member 9, all substantially as specified and for the purpose set forth.

3. Ina spark-arrester,the combination with a stack of an inverted-cone-shaped member 4 having a damper at its lower end, in combination with a depending collar 9 directed downward within the chamber formed by the member 4, and a plurality lof spark-arresting devices carried by said member 4 and collar 9, all substantially as specified and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALVIN E. I-IESS.

Witnesses:

W. W. REIsENwEAvER, HARRY F. GOMBER.

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